摘要
在无线网络中,带宽和降低功耗的需求导致小区的覆盖范围变小,这就要求减少用户与基站的距离,进而增加系统容量。传统宏蜂窝和低功率小蜂窝共存的异构网络可以有效地提高系统容量,但是宏蜂窝和小蜂窝的同层干扰和跨层干扰严重影响了系统性能。提出了分层干扰对齐预编码技术,有效地缓解了同层干扰和跨层干扰。
The need for bandwidth and the incitation to reduce power consumption leads to the reduction of cell size in wireless networks, which allows reducing the distance between user and the base station to increase the capacity. The traditional marcro cells and the lowpower small cells from the heterogeneous multi-tiered network can improve the capacity of wireless systems. However, the interference between marcro cells and small cells in the same frequency band degrades the performance of system. This paper proposes hierarchical interference alignment to mitigate the interference in heterogeneous networks.
出处
《微型机与应用》
2015年第2期67-68,71,共3页
Microcomputer & Its Applications
关键词
分层异构网络
干扰抑制
MIMO预编码
hetergonous multi-tiered network
interference suppression
MIMO precoding
